Parque Nacional de Timanfaya Nature · Yaiza, Lanzarote, Las Palmas Declared a national park on 9 August 1974, it covers 51.07 km² between Yaiza and Tinajo across more than 25 volcanic formations, among them the Montañas del Fuego (Fire Mountains). The subsoil still retains residual heat from the 18th-century eruptions, with temperatures of 100-120°C just a few metres down; it is the second most visited national park in the Canary Islands. Photo: Dguendel (CC BY 4.0) What to see and do in Yaiza